Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103..793s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, March 1992, p. 793-799.
Astronomy and Astrophysics
Astronomy
10
Galactic Structure, Globular Clusters, Infrared Astronomy, Near Infrared Radiation, Spectral Bands, Astronomical Photometry, Gray Scale, Isophotes, Synthetic Apertures
Scientific paper
Results of imaging of NGC 5195 in the NIR J, H, and K bands with the Wyoming Infrared Camera are presented. The observations map a 3.5 by 3.5-arcmin field at a resolution of 2 arcsec. Data reduction is described and aperture photometry, which provides an unobstructed view of the galaxy from which to perform a morphological classification and make measurements, is presented. Three distinct components which are clearly visible in these images - a bulge, a bar, and a disk - are discussed. The central portion of the bulge has a surface brightness distribution consistent with a r exp 1/4 surface brightness law, and displays a pronounced isophotal twist. Inside the diameter marked by the ends of the bar, the surface brightness of the disk falls below the extrapolated surface brightness of the disk. It is concluded that the galaxy belongs to type II investigated by Freeman (1970).
Johnson Paul E.
Oh Siang Peng
Spillar Earl J.
Wenz Michael
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